Related question, so please excuse the hijack...

If I were looking at Dura Ace road cranks, do I want to stick to an older one that works with a square taper bottom bracket, or is the range of Octolink bottom bracket sizes good enough so that I will be able to get the chainline right?

Lots of DA 7700 cranks with Octolink on ebay that are much cheaper than the 'proper' DA track cranks. (and no, I don't like the look of running on the inside ring, would rather have it on the outside and move the whole crank)